@antv/f2/es/deps/d3-hierarchy/src/hierarchy/links.js

Charts for mobile visualization.

export default function () {
  var root = this,
    links = [];
  root.each(function (node) {
    if (node !== root) {
      // Don’t include the root’s parent, if any.
      links.push({
        source: node.parent,
        target: node
      });
    }
  });
  return links;
}